diff --git a/tests/cql/CqlNullologicalOperatorsTest.xml b/tests/cql/CqlNullologicalOperatorsTest.xml
index d3b89bc..a7afb6e 100644
--- a/tests/cql/CqlNullologicalOperatorsTest.xml
+++ b/tests/cql/CqlNullologicalOperatorsTest.xml
@@ -59,6 +59,35 @@
Coalesce({ null, null, @T05:15:33.556 })
+
+
+
+ Coalesce(null, 15, null)
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+
+
+
+
+ Coalesce(null, null, null, 'd')
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+
+
+
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+ Coalesce(null, null, null, null, 'e')
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+
+
+
+
+ Coalesce({ null, null, null })
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+
+
+
+
+ Coalesce(null, 15, null, null, null, null)
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@@ -87,6 +116,18 @@
IsNull(0)
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+
+
+ null is null
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+
+
+
+
+ 'abc' is null
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+
@@ -105,6 +146,24 @@
IsFalse(null)
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+
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+ false is false
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+
+
+
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+ true is false
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+
+
+
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+ null is false
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+
@@ -123,5 +182,23 @@
IsTrue(null)
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+
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+ true is true
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+
+
+
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+ false is true
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+
+
+
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+ null is true
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+